Smart Date Formater

formatDate.js

/**
 * Format Date smartly
 * @param  {stirng} pubdate General date
 * @return {string}         
 */
function formatDate(pubdate) {
    var pd = new Date(pubdate);
    var td = new Date();
    var diff = (td.getTime() - pd.getTime()) / 1000;
    if (diff / 3600 / 24 > 99) {
        return (pd.getMonth() + 1) + '月' + pd.getDate() + '日';
    } else if (diff / 3600 / 24 >= 1) {
        return Math.round(diff / 3600 / 24) + '天前';
    } else if (diff / 3600 >= 1) {
        return Math.round(diff / 3600) + '小时前';
    } else if (diff / 60 >= 1) {
        return Math.round(diff / 60) + '分钟前';
    } else {
        return Math.round(diff) + '秒前';
    }
}